My wife and I have a wedding photo business. I am currently using a D300 with an SB800 flash. My wife is using a D700 with the SB900. Recently my flash has started acting up and I think it's time for a new one. I see the SB800 is no longer available and I think the SB900 is the worst flash I have seen in ages. The high noise it creates when zooming, along with the flash shutting off after it gets warm make it a no no in my book. Can someone suggest a powerful flash (as good as the SB800) that runs cool for a decent price? Are these flashes made by Sunpak, Metz, Nissin, Sigma etc as good as a Nikon? Thanks for the help guys!